CLAMPS FOR FLUID CONDUITS

Abstract

In the field of air handling, or indeed any type of fluid handling, there is provided clamp, for holding first and second fluid conduits in fluid-tight engagement with one another via respective flanges thereof. The clamp comprises first and second clamp body portions that define corresponding first and second mutually opposed flange engagement formations. The first clamp body portion is slidably received within the second clamp body portion to restrain linearly movement of the first and second flange engagement formations towards and away from one another. The first and second flange engagement formations are resiliently biased towards one another.

Claims

1. A clamp, for holding first and second fluid conduits in fluid-tight engagement with one another via respective flanges thereof, comprising first and second clamp body portions defining corresponding first and second mutually opposed flange engagement formations, the first clamp body portion being slidably received within the second clamp body portion to restrain linearly movement of the first and second flange engagement formations towards and away from one another, the first and second flange engagement formations being resiliently biased towards one another.

2. The clamp of claim 1 wherein the first clamp body portion includes an actuator portion which extends through and beyond the second clamp body portion, the actuator portion terminating at a distal end and movement of the distal end towards the second clamp body portion acting against the resilient bias to move the first and second flange engagement formations away from one another.

3. The clamp of claim 2 wherein the distal end of the actuator portion defines an enlarged engagement head.

4. The clamp of claim 2 wherein the distal end of the actuator portion defines an enlarged engagement head and the enlarged engagement head retains a biasing member between the distal end of the actuator portion and the second clamp body portion, the biasing member urging the distal end away from the second clamp body portion.

5. The clamp of claim 2 wherein the second clamp body portion includes a retention formation configured to retain a first jaw of a plier tool and thereby facilitate the application of a force by a second jaw of the plier tool to the distal end of the actuator portion.

6. The clamp of claim 2 wherein the second clamp body portion includes a retention formation configured to retain a first jaw of a plier tool and thereby facilitate the application of a force by a second jaw of the plier tool to the distal end of the actuator portion and the retention formation is formed within the second clamp body portion.

7. The clamp of claim 2 wherein the second clamp body portion includes a retention formation configured to retain a first jaw of a plier tool and thereby facilitate the application of a force by a second jaw of the plier tool to the distal end of the actuator portion and the retention formation extends beyond the second clamp body portion.

8. The clamp of claim 2 wherein the second clamp body portion includes a retention formation configured to retain a first jaw of a plier tool and thereby facilitate the application of a force by a second jaw of the plier tool to the distal end of the actuator portion, the retention formation extends beyond the second clamp body portion, and the retention formation includes a rebate formation.

9. The clamp of claim 1, further comprising a fluid conduit assembly having a first and a second fluid conduit, each having a respective flange, in which the flanges are secured together by the clamp so as to hold the first and second fluid conduits in fluid tight engagement with one another.

10. A method of holding first and second fluid conduits in fluid-tight engagement with one another via respective flanges thereof comprising the steps of: (a) arranging the first and second fluid conduits in engagement with one another; (b) utilising a plier tool to move first and second flange engagement formations of a clamp according to claim 1 away from another; (c) arranging the first and second flange engagement formations in communication with the respective flanges of the first and second fluid conduits; and (d) removing the plier tool to permit resilient biasing of the first and second flange engagement formations towards one another to secure the respective flanges of the first and second fluid conduits together and thereby hold the first and second fluid conduits in fluid-tight engagement with one another.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order that the present invention may be well understood, two embodiments thereof, which are given by way of example only, will now be described in more detail, with reference to the accompanying drawings, in which:

[0031] FIG. 1 shows a perspective view of a clamp according to a first embodiment of the invention;

[0032] FIG. 2(a) shows a plier tool in engagement with the clamp shown in FIG. 1;

[0033] FIG. 2(b) shows the plier tool alone;

[0034] FIG. 3 shows a fluid conduit assembly including first and second fluid conduits held in fluid-tight engagement with one another by the clamp shown in FIG. 1; and

[0035] FIG. 4 shows an isometric view of the clamp according to a second embodiment of the invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] A clamp according to a first embodiment of the invention is designated generally by reference numeral 10, as shown in FIG. 1.

[0037] The first clamp 10 includes first and second clamp body portions 12, 14 that define corresponding first and second mutually opposed flange engagement formations 16, 18. In the embodiment shown, each of the first and second flange engagement formations 16, 18 includes a recess formation 20 in the form of a slot 22 which extends widthwise thereacross. In other embodiments of the invention (not shown) one or more of the recess formations may be omitted and/or they may take a different form.

[0038] The first clamp body portion 12 is slidably received within the second clamp body portion 14 in a manner that restrains movement of the first and second flange engagement formations towards and away from one another in a linear direction. More particularly, the first clamp body portion 12 has a substantially rectangular cross-sectional profile which is received within a complimentary, substantially rectangular open channel cross-sectional profile of the second clamp body portion 14. In such a way the first and second clamp body portions 12, 14 are restrained from moving in a widthwise direction W.sub.i relative to one another, as well as from rotating relative to one another about a common axis 24 extending in a lengthwise direction L.sub.e relative to both the first and second clamp body portions 12, 14. Meanwhile, however, the first and second clamp body portions 12, 14 are able to move in the said lengthwise direction L.sub.e relative to one another, so as to provide for the said restrained linear movement of the first and second flange engagement formations 16, 18 towards and away from one another.

[0039] The first clamp body portion 12 includes an actuator portion 26 which extends through and beyond the second clamp body portion 14. Such extension of the actuator portion 26 through the second clamp body portion 14 assists further in restraining movement of the first clamp body portion 12 relative to the second clamp body portion 14, and in particular inhibits to a degree the extent to which the first and second clamp body portions 12, 14 are able to move in a lateral direction L.sub.a, which extends perpendicularly to both the aforementioned widthwise and lengthwise directions W.sub.i, L.sub.e, relative to one another.

[0040] The actuator portion 26 terminates at a distal end 28 which defines an enlarged engagement head 30.

[0041] The enlarged engagement head 30 retains a biasing member 32 between the distal end 28 of the actuator portion 26 and the second clamp body 14. In the embodiment shown the biasing member 32 takes the form of a compression spring 34, although other forms of biasing member may be used.

[0042] The biasing member 32, i.e. the compression spring 34, urges the distal end 28 of the actuator portion 26 away from the second clamp body portion 14, and so acts to resiliently bias the first and second flange engagement formations 16, 18 towards one another. Cooperating formations 36 on each of the first and second and second clamp body portions 12, 14 act to limit the extent to which the first and second flange engagement formations 16, 18 are able to move towards one another and thereby define a desired equilibrium spacing between the first and second flange engagement formations 16, 18, e.g. as shown in FIG. 1.

[0043] Meanwhile, movement of the distal end 28, i.e. via the enlarged engagement head 30 defined thereby, towards the second clamp body 14 acts against the aforementioned resilient bias to move the first and second flange engagement formations 16, 18 away from one another.

[0044] In addition to the foregoing, the second clamp body portion 14 includes a retention formation 38 which is formed within the second clamp body portion 14, and more particularly takes the form of a recess 40 formed within the second clamp body portion 14.

[0045] The retention formation 38, i.e. the recess 40, is configured to retain a first jaw 42 of a plier tool 44 and thereby facilitate the application of a force by a second jaw 46 of the plier tool 44 to the distal end 28, i.e. the enlarged engagement head 30, of the actuator portion 26, e.g. as shown in FIG. 2(a).

[0046] A preferred type of plier tool 44 for use with the first clamp 10 is a so-called pair of Cleco pliers 48, as shown on their own in FIG. 2(b), which are specifically adapted for use with proprietary Cleco fasteners.

[0047] In order to securely hold first and second fluid conduits 50, 52, which have respective flanges 54, in fluid-tight engagement with one another, the first clamp 10 is preferably used in accordance with the following steps.

[0048] Firstly, the first and second fluid conduits 50, 52 are arranged in engagement with one another, e.g. as shown in FIG. 3.

[0049] A plier tool 44, such as a pair of Cleco pliers 48, is then engaged with the first clamp 10, e.g. in the manner shown in FIG. 2(a) in which a first jaw 42 of the pliers 48 is inserted into the retention formation 38, i.e. the recess 40, formed within the second clamp body 14 and a second jaw 46 is engaged with the enlarged engagement head 30 at the distal end 28 of the actuator portion 26.

[0050] The pliers 48 are then used to move the first and second flange engagement formations 16, 18 away from one another by driving the enlarged engagement head 30 towards the second clamp body portion 14 to compress the compression spring 34 and thereby temporarily overcome the resilient bias provided by the said compression spring 34, i.e. the biasing member 32.

[0051] The increased spacing from one another of the first and second flange engagement formations 16, 18 assists an operative in arranging the first and second flange engagement formations 16, 18 in communication with, i.e. in close proximity to, the respective flanges 54 of the first and second fluid conduits 50, 52.

[0052] Thereafter, the pliers 48 are released and removed to permit the resilient biasing provided by the compression spring 34 to move the first and second flange engagement formations 16, 18 towards one another to secure the respective flanges 54 of the first and second fluid conduits 50, 52 together and thereby hold the first and second fluid conduits 50, 52 in fluid-tight engagement with one another, as shown in FIG. 3.

[0053] Each respective flange 54 includes a flange formation 56, which in the example shown takes the form of a circumferential lip 58 (although other flange formations may also be used), that cooperates with the recess formation 20, i.e. slot 22, included in each of the first and second flange engagement formations 16, 18 to inhibit radial movement of the first clamp 10 away from each of the first and second fluid conduits 50, 52.

[0054] The foregoing steps result in a fluid conduit assembly 60, e.g. as shown in FIG. 3, which comprises first and second fluid conduits 50, 52, each of which has a respective flange 54, and in which the said respective flanges 54 are secured together by the first clamp 10 so as to hold the first and second fluid conduits 50, 52 in fluid-tight engagement with one another.

[0055] A clamp according to a second embodiment of the invention is designated generally by reference numeral 70, as shown in FIG. 4.

[0056] The second clamp 70 is similar to the first clamp 10 and like features share the same reference numerals. The second clamp 70 does, however, differ from the first clamp 10 in that the second clamp body portion 14 includes a retention formation 38, to retain a first jaw 42 of a plier tool 44, which instead extends beyond the second clamp body portion 14.

[0057] More particularly, the retention formation 38 includes a rebate formation 72 behind which, in use, the said first jaw 42 of a plier tool 44 lodges so as to permit the required application of a force by a second jaw 46 of the plier tool 44 to the distal end 28 of the actuator portion 26.

[0058] More particularly still in the second clamp 70 shown, the retention formation 38 takes the form of an annular boss 74 which extends from the second clamp body portion 14 and includes an annular collar 76 that defines the rebate formation 72. Other forms of retention formation are also possible however.

[0059] The second clamp 70 is used in essentially the same manner as the first clamp 10.

TABLE-US-00001 Table of reference numerals 10 First clamp 12 First clamp body portion 14 Second clamp body portion 16 First flange engagement formation 18 Second flange engagement formation 20 Recess formation 22 Slot 24 Common axis 26 Actuator portion 28 Distal end 30 Engagement head 32 Biasing member 34 Compression spring 36 Cooperating formations 38 Retention formation 40 Recess 42 First jaw 44 Plier tool 46 Second jaw 48 Cleco pliers 50 First fluid conduit 52 Second fluid conduit 54 Flange 56 Flange formation 58 Lip 60 Fluid conduit assembly 70 Second clamp 72 Rebate formation 74 Annular boss 76 Annular collar W.sub.i Width-wise direction L.sub.e Lengthwise direction L.sub.a Lateral direction